It's not a standard colour. 2G puts it in the metallic gold/brown category, and VL standard colours Kimberly Bronze & Platinum Gold are either side of it, with other VL golds not far off - like White Gold.
I have seen 2 Gemini Gold VLs now, but I checked and because it's more orange, it's a 2D prefix.
There's 2 mulberrys - the lighter one starts with 2A, and the darker is in with reds - 2F.

Considering it's right between 2 common VL colours that weren't used on other Commodore models, you can safely say the numeric (053) part of the code dates it as being documented in 85-86. I don't have it listed for RB Gemini or Camira either. Mind you, similar codes also turn up on Isuzu trucks too.

I would suggest it's a colour that didn't end up getting released (obviously) for regular production, and if a couple have turned up, and it's not a company colour, then they were probably styling clinic cars.

There's an aqua VL getting around with a unique code too. It's a very bright colour, like the BF and FG falcon colour "breeze".
I saw it in the carpark at ARB in Melbourne about 10 years back, and got the code off it (an employee was driving it).
One of the current Holden spare parts employees I deal with, and talk cars with, remembers seeing a similar colour as a late teenager when his old man worked at Dandenong and he used to pick him up after work. He loved the VL, and still owns a few to this day. He said he saw a truck load of oddball coloured VLs, and his old man told him it was going to a place in Melbourne for the public to gauge reactions. Some of those colours turned up on VNs.

Thanks for the replies peeps. I did think perhaps a colour for testing.

Lot of VL's don't have that, just what colour the trim is. for instants 65i which denotes Sandalwood colour trim

Melbourne cars have the combination number, Adelaide do not.